All the ones I've seen are either 500MB or 1gig (although I would expect others to be available) . I would have thought that 500MB would have been enough, as you're not d/l songs, films, etc. Just brousing on the internet, checking emails and googling don't use too much.
Have you considered getting a SIM only contract? If you already have a phone - all you pay for is the mins, texts and internet. When my 18 month contract was up - I decided not to upgrade, as I was more than happy with my current phone (Nokia N86) so I went onto a SIM only plan. I'm on a 12 month contract and I pay £15 per month. For this I get 600 minutes, unlimited texts and 1gig internet :)



